Questions tagged [human-anatomy]
This tag is for questions about the general anatomical features of human beings as opposed to the anatomy of non-human animals.
555
questions
4
votes
0
answers
82
views
Medical terminology for asymmetrically-shaped paired body parts?
Some people have different sized feet [source], a limb that is slightly longer than the contralateral (on other side of the body) limb [source], or other instances of paired body parts being different ...
- 29.2k
2
votes
1
answer
37
views
can auditory/ocular reflexes exist?
In the same way the knee-jerk reflex is a thing (I think the nerve signal doesn't go through the brain?), can stimuli received by the eyes or ears trigger "instantaneous" (faster than the brain can ...
- 197
1
vote
0
answers
47
views
Can we "learn" reflexes?
Can we force our bodies to react to situations faster than our brain can think about them?
Some reflexes I can think of off the top of my head:
knee jerk reflex
retracting hand when touching a hot ...
- 197
2
votes
1
answer
143
views
What forms this pad on the side of the face?
I've been trying to figure out this for the best portion of this morning, but what structures are responsible for the pad highlighted in red? (sorry for low quality of picture, was just watching the ...
- 21
-1
votes
2
answers
2k
views
Why does flicking a finger generate so much more force than extending it quickly?
Flicking a finger (holding it back with e.g. the thumb while building up "pressure" against the thumb, then releasing) is much more powerful than just uncurling the finger quickly.
I tried to do the ...
- 197
2
votes
1
answer
602
views
Why are human bones usually curved?
Is there any simple explanation as to why human bones are more curved than straight and are thicker at ends and thinner in the middle?
- 143
2
votes
2
answers
386
views
Why don't we speak of medial and lateral rotation of the forearm? And pronation and supination of the upper arm?
Why don't we speak of medial and lateral rotation of the forearm?
I notice we speak of forearm supination and forearm pronation, but why not medial and lateral rotation.
It seems to me that if we ...
- 735
3
votes
1
answer
46
views
Surface perception
I'm looking for research studying:
How small and compressed together do particles of a surface need to be to be perceived as solid surface to human touch? E.g. sand still feels grainy. Has there been ...
- 41
1
vote
1
answer
82
views
Are your finger muscles and tendons interconnected?
Are finger muscles and tendons interconnected? If they are interconnected, then if i exercise one finger will it train the other fingers since they are interconnected and share the same muscles in the ...
- 123
2
votes
0
answers
66
views
ATP and Muscle Contraction
I have a question regarding how molecular interactions manifest in physical actions - such as hanging from a bar. To the best of my understanding, when it comes to the contraction of muscles, ATP is ...
1
vote
0
answers
336
views
Movement of the Thoracic Cage During Movements of the Thoracic Spine
Just for a bit of context: I am trying to create a 3D digital model of the human skeleton as the first step towards computer generated muscle simulation, and as such I want the skeleton to be as ...
- 139
1
vote
1
answer
383
views
Passing out from drowning [closed]
How long does it take to pass out from oxygen deprivation? The person is panicked and screaming so they accidentally breathe water into the lungs. So how long would it take for them to pass out? After ...
- 119
1
vote
0
answers
33
views
For each movement performed by both the gluteus minimus and medius, what percentage of the movement do the gluteus minimus and medius account for?
From what I read on Wikipedia, all functions of the gluteus minimus are mirrored by the gluteus medius. Additionally, the gluteus medius is larger than the gluteus minimus (see comparative images here)...
- 1,855
1
vote
1
answer
53
views
Does a full tear of the gluteus minimus tendon result in a long-lasting inflammatory response?
Does a full tear of the gluteus minimus tendon result in a long-lasting inflammatory response?
This answer mentions:
An isolated gluteus minimus tear still causes functional problems because of ...
- 1,855
1
vote
1
answer
82
views
Does a full tear of the gluteus minimus tendon has any functional implications?
From what I read on Wikipedia, all functions of the gluteus minimus are mirrored by the gluteus medius. Additionally, the gluteus medius is larger than the gluteus minimus (see comparative images here)...
- 1,855
-1
votes
1
answer
58
views
How many different states can the femur and lower limb be in?
Often the knee can be thought of as a hinge joint. However, when it flexes, the knee permits the lower leg to rotate. So it is not a pure hinge joint in absolute sense because it permits more range of ...
- 2,060
10
votes
2
answers
3k
views
Where can I find the list of all tendons in the human body?
https://www.healthcentral.com/article/aging-can-take-major-toll-on-womens-tendons (mirror) claims that:
There are about 4,000 tendons throughout the body.
This claim is echoed by a fair amount of ...
- 1,855
1
vote
1
answer
177
views
What's the subpatellar tendon?
I read in Thomas Myers book Anatomy Trains:
Although the muscles themselves have attachments within the anterior
compartment to the tibia, fibula, and interosseous membrane, the next
station ...
- 2,534
-2
votes
1
answer
1k
views
Why we can't feel our internal organs? [closed]
We have lungs,kidneys, stomach etc.But why we can not feel them consciously?
- 21
2
votes
1
answer
36
views
Is "muscular attachment" synonymous to tendon? (when talking about the insertion of glutei medius and minimus to greater trochanter of the femur)
I have read the following two terms in an MRI report (both points refer to the insertion of gluteus medius/minimus to greater trochanter of the femur):
mild degeneration of the muscular attachment ...
- 1,855
1
vote
1
answer
2k
views
Where does the gluteus medius attach to the greater trochanter compared to the gluteus minimus attachment?
Where does the gluteus medius attach to the greater trochanter of the femur compared to the gluteus minimus attachment? Is it above, below, next to it, etc.? Ideally I'd like to know the distance as ...
- 1,855
1
vote
1
answer
121
views
Do the left half and right halves of the diaphragm undergo the same displacement during breathing?
Do the left half and right halves of the diaphragm of a normal person move exactly the same distance between inhaling and exhaling?
2
votes
0
answers
53
views
Is the tendon width determined by genetic predisposition, and if so, is genetics the sole factor?
Tendons' widths vary widely across humans. E.g.:
{1}: "the mean patellar tendon width was 26.10mm (SD = 3.31; range 18.33mm-33.33mm)"
{2}: "Size of the patellar tendon width, measured at the same ...
- 1,855
2
votes
2
answers
1k
views
What is the difference between "hamstring tendon" and "common hamstring tendon"?
What is the difference between "hamstring tendon" and "common hamstring tendon"? I have seen both terms being used but I don't know whether they referred to the same tendon.
For example,
Johnson, ...
- 1,855
-4
votes
1
answer
165
views
How atom works and it's different from DNA? [closed]
I am studying atoms recently because I am writing a short story and the characters would talk about it for a bit. And I wish it's scientifically accurate.
So I read a lot of articles about the atom ...
- 1
7
votes
1
answer
406
views
What's a "constitutionally small penis"?
I'm reading some urology papers and came across one involving penis growth (Kim & Song, 2008); here's an intro passage that I'm confused about:
A total of 58 patients with constitutionally small ...
- 87
0
votes
0
answers
17
views
What soft tissue separates bones of toes?
I need to know a little about the "knuckles" of toes; specifically the 4 areas that separate the 5 proximal/metatarsal joins.
I'd like to know the terms for areas that might be damaged if the width ...
- 191
1
vote
1
answer
43
views
Have there been new discoveries concerning the perception of taste for the last 10 years? [closed]
What are the last discoveries concerning the perception of taste for the last 10 years?
We discovered the 5th flavour: umami.
Also the 6th and 7th: oleogustus and starchy.
Anything else?
Maybe in ...
- 19
3
votes
2
answers
881
views
How is breathing involuntary if the muscles that control it are skeletal?
How is breathing involuntary if the muscles that control it are skeletal? Breathing is involuntary. However, the muscles that control it are skeletal: intercostal muscles and the diaphragm. Are there ...
- 77
0
votes
1
answer
213
views
Is there any way bicondylar/bigonial, bizygomatic or bitemporal breadth can change in adults?
Without cosmetic surgery or etc., are there any cases/example wherein a human adult has had a change in significance regarding these regions of the face? I have seen many anecdotes where people have ...
0
votes
1
answer
268
views
Prostate, seminal vesicles or testis which one is bigger(by volume and size)? [closed]
I can't understand this by looking at these photos, especially the last picture makes me more doubtful.
Do you know which of them is the biggest one by volume?
Another question is, what is the ...
- 265
4
votes
1
answer
147
views
Can the heart generate its own rhythm independent to the SAN?
My textbook and a revision guide, which I believe is a reinterpretation of the textbook, state that:
The SAN initiates waves of excitation that usually override the myogenic action of the cardiac ...
- 111
-1
votes
1
answer
508
views
What are the brain structures directly on top of the brain stem?
I have been trying to learn the anatomy of the brain, and some information on their functions, through an iPad app called 3D Brain. Whilst going through the different parts, I have noticed that one ...
- 277
1
vote
0
answers
24
views
What is the name of the wrinkles occurring in people's lips? [closed]
I was wondering if there is a name for the wrinkles occurring in people's lips.
Just curious.
- 111
2
votes
0
answers
102
views
How can we usually "trust a fart" not to be liquid or solid?
Jack Nicholson's character Edward Cole in the movie The Bucket List said ...and never trust a fart, and a search for Al Roker leakage White House will clear up any doubts what that's all about.
How ...
- 5,029
1
vote
0
answers
88
views
What are the (statistically) normal pH levels in the most-outer part of human sexual organs?
What are the (statistically) normal pH values of the outer skin/epidermis of human sex organs (groin/crotch) in the male and female? e.g male testes, female vulva, male glans, the enveloping epiderm, ...
- 19
0
votes
2
answers
256
views
Would prehistoric humans have been considered negroid or australoid by modern standards? [closed]
What are your thoughts about this?
For myself I think that the subject statement is rather obvious isn’t it, since Africans, & especially Australian Aboriginals, have the most archaic features &...
-2
votes
1
answer
220
views
Is there an adjective I can use to describe body parts like hands, feet, eyes, and ears that exist on both sides of the body's sagittal plane?
Body parts like human hands, feet, ears, eyes, etc. exist on either side of the human body's sagittal plane and can therefore be specified with the adjectives left and right. Is there a special ...
0
votes
1
answer
228
views
How are fingerprints formed?
I know what influences the fingerprints to be unique always. But what actually process is taken to make these as we grow?
3
votes
2
answers
361
views
Does blood clot reduce blood flow?
I read that blood clot reduces blood flow from few website and from doing an A level biology question; and if this blood clot is formed in pulmonary thrombosis, this can reduce gas exchange in lung.
...
- 236
1
vote
0
answers
876
views
What is the average human body density?
Looking for values of the average human body density on the Internet, one often finds the values of 0.98 for male, 0.87 for female. Other values are 0.985 for male and female. However, I can find no ...
- 11
2
votes
0
answers
185
views
Why doesn't peritoneal dialysate leak through the fallopian tubes?
It is my understanding that the female peritoneum does not form a closed (potential) space due to its puncture by the uterine tubes. If that is indeed the case, why is peritoneal dialysis in women not ...
- 21
1
vote
1
answer
91
views
Is the mesenterium a synonym for the mesocolon?
On biodigital anatomy browser I found a structure called the mesocolon. I didn't find the term in Uberon and I'm unclear whether it's simply a synonym for mesenterium or whether it's a separate ...
- 2,534
1
vote
1
answer
2k
views
What does 'proper' mean in the anatomical context?
I've seen the word 'proper' in websites, lectures, etc., in the context of human anatomy. But I'm unsure as to what its definition is. For example, the 'oral cavity proper'.
2
votes
1
answer
307
views
In what fluid does the sperm swim in the oviduct?
We know that after sexual intercourse, sperm enters the female body and continues to pass through the oviduct by swimming. "Swimming" implies the presence of fluid.
I want to know what that fluid is ...
- 193
2
votes
1
answer
534
views
What is meant with “the chest wall and lungs are coupled together”?
Since the lung and chest are elastic, we can represent them with springs. Under normal conditions, they are coupled together: the “lung” springs are stretched and the “chest” springs are compressed. ...
- 303
2
votes
0
answers
3k
views
Average width of the male body
I've been looking for the average width (at widest point) of the average American male body but couldn't find it anywhere so far.
When I say "widest point", I mean that if you draw a rectangle (that ...
- 131
0
votes
1
answer
77
views
Structure separating the left atrium from the ascending aorta?
With reference to the (adult) anatomy of the human heart:
The left atrium (LA) and the proximal part of the ascending aorta (Ao) abut one another, as shown nicely in this image [1]. Is there a name ...
1
vote
1
answer
247
views
Why we can't feel the different parts of ear during hearing which is mentioned in all biology books?
We can't feel our outer ear, middle ear and inner ear during hearing something. Why is that such a complex phenomenon is happening all the time but still we don't have any clue regarding that in our ...
- 21
-3
votes
2
answers
84
views
quadrupedalism in human [closed]
Recently I saw a BBC documentary on a family from a remote village in turkey where one couple has 18 children and out of which 5 are walking on four legs. These children are 28-34 yr old & have ...
- 101